Automatic shaker shovel



im. n4, 1936. R, GIBSQN 2,027,639

AUTOMATIC SHAKER SHOVEL Filed July 29, 1932 2 Sheets-Sheet 1 OOG lOl IIIItOI IOIHIIOI Jam. 14, 1936., R. GIBSON 2,027,639

AUTOMATIC SHAKER SHOVEL Filed July 29, 1932 2 sheets-sheet 2 7 4 4 A 2 d/ l/z 33 32 i /0. fn

v@ Q//MMW Patented Jan. 14, 1936 UNITED STATES PATENT OFFICE AUTOMATIC SHAKER SHOVEL Application July 29, 1932, Serial No. 625,899 in Canada July 31, 1931 8 Claims.

This invention relates to mining apparatus and particularly to means for feeding and loading the shovel section of the shaker shovel type.

The object of the invention is to provide an improved form of feeding and loading means whereby the shovel and its trough section is automatically advanced or retired.

A further object is to provide feeding mechanism which will have greater power, more positive action and less loss of motion than has hitherto been obtainable.

A further object is to produce feeding mechanism of light construction entirely free from fixed supports and situated below the trough surface.

A further object is to provide a feeding mechanism with balanced action which avoids distortion and operates with a minimum of friction.

The invention consists brieily in a trough section with shovel extension having wire ropes mounted on both sides between brackets. This trough section slides on a lower reciprocating trough section which carries side pulleys with ratchet wheels and adjustable pawls having the wire ropes looped about the pulleys on each side and adapted when reciprocated in the usual manner to either advance the upper section to retire it or simply to reciprocate together with the lower trough.

Adjacent this feed mechanism is a guide and tensional device having roller or rollers supporting the lower trough and side pulleys, and ratchets, mounted on stub shafts journalled on bearings supported on a base plate. The wire ropes of the upper trough section are also looped in the same manner over these pulleys, the ratchets are controlled by reversing pawls. The plate is mounted on a curved track and means are provided to move the plate sideways on the track.

Reference is made to the accompanying drawings in which;

Figure 1 is a plan view of the controlling apparatus.

Figure 2 is a vertical section on the line 2--2 of Figure 1.

Figure 3 is a vertical section on the line 3-3 of Figure 1.

Figurefl is a side View of the device.

Figure 5 is an enlarged detail view of the feeding ratchets.

Figure 6 is a plan view of the complete apparatus.

In Figure 6 the trough l is shown with the extension shovel l2, this trough I sits in the lower trough 2 which extends with connections to the reciprocating mechanism which is not shown in the drawings. On each side of ,the trough l, between brackets ll, having the usual tension terminals are the ropes Ill. Thev lower trough has cross flat bars .'ilv welded to its bottom and sides. Brackets 2l are bolted to these bars and support frames 3, these frames 3 comprise inner U-bar 30, outer U-bar 3l and top U-bar 32.

A shaft il having pulleys 40 and ratchet wheels li and i2 keyed tok it are journalled in the frame to rotate freely. On one side are a pair of reverse ratchet wheels fill and 42' while the other pulleys have single ratchet 4|. The ratchets have pawls d3, meshing with ratchet wheels il and pawl M meshing with ratchet wheel 42. The pawls are controlled by a control fork 61, which when raised throws both ratchets out of action, which when moved to 'the right brings the pawls lll into action and when moved to the left brings the pawl 44 into action with ratchet wheel t2.

The wire ropes l0 are looped over the pulleys it, and connect the upper trough with the feed mechanism and the lower trough.

Adjacent to this feed mechanism is situated a supporting directing and rope tensioning device. This comprises a base plate 5, on which are two sets of bearing standards 553/ having bearings 5I, in which are journalled stub shafts supporting the pulleys Gt, with ratchet wheelsk 6l and 62 which are reverse ratchets. Pawls 63 and 64 are mounted on and controlled by a pawl rod B5.

Secured to the bottom of the lower trough are guide bars 22. Rollers l journalled in anti-friction bearings ll, and bearing posts 10, run on these guide rails and support and direct the lower trough 2.

The base plate 5 is mounted on a curved track 8, extending to each side and having suitable means to adjust it sideways thereon, and the plate 5 can thus be readily moved to either side and the shovel brought to operate on a new area.

Figure 5 shows a detail of the reversing p-awls 133 and ed, S3 being adjustably controlled while llfl is secured directly to its spindle.

The action of the device is as follows:-

When it is desired to feed the shovel forward the pawlsll and 63 are set to mesh with their ratchets, and the reciprocation of the lower trough 2, causes the upper trough I, to slide forward on its forwardstroke and thus advance by successive steps. If the ratchets of both are released the two troughs will operate together and merely set as a conveyor. When the upper trough has advanced to its limit or it is desired to withdraw it or retire it, the pawls 44 and 64 are adjusted to mesh with their ratchets and the reciprocation of the lower trough will cause the upper trough to retire by successive steps.

As the ropes are looped about two sets of pulleys, the one set reciprocating with the lower trough while the other set is stationary the ropes Will be held in proper tension at all times and lost motion avoided. A positive action of the highest efficiency is thereby obtained. The weight of the feeding mechanism is supported by the lower trough which moves on the rollers freely. As it is equally divided on each side there is balanced action and no tendency to distortion or displacement.

The guide bars of the lower trough keep it on the rollers and when the base plate is moved transversely, these bars will bring the lower trough into its new position without strain or friction.

What I claim is:

1. In a device of the class specified the combination of a reciprocating trough section and a shovel trough section mounted to slide thereon and means to feed the second section in either direction, mounted under the rst section, having ropes at the sides of the second section adapted to control its movement.

2. In a device of the class specified the combination of a reciprocating trough section and a shovel trough section mounted to slide thereon and means to feed the second section in'either direction, mounted under the rst section, having ropes at the sides of the second section adapted to control its movement and a stationary roller support adjacent said means having tensioning devices for said side ropes.

3. In a device of the class specified the combination of a reciprocating trough section and a shovel trough section mounted to slide thereon, and having ropes at each side between terminal brackets, frames secured to the first section journalling pulleys and reversing ratchets, with adjustable pawls, the ropes looped around the pulleys.

4. In a device of the class specied the combination of a reciprocating trough section and a shovel trough section mounted to slide thereon, and having ropes at each side between terminal brackets, frames secured to the rst section journalling pulleys and reversing ratchets with adjustable pawls, the ropes looped around the pulleys, with a rope tensioning device, mounted on a stationary roller support adjacent of the said frames.

5. In a device of the class speciiied the combination of a reciprocating trough section and a shovel trough section mounted to slide thereon, and having ropes at each side between terminal l brackets, frames secured to the rst section journalling pulleys and reversing ratchets, with adjustable pawls, the ropes looped around the pulleys, with a rope tensioning device, mounted on a stationary roller support adjacent to the saidl frames, comprising pulleys and reversing ratchets journalled on stub shafts, with the ropes looped on such pulleys.

6. In a device of the class specified the combination of a reciprocating trough section and a 2 shovel trough section mounted to slide thereon, and having ropes at each side between terminal brackets, frames secured to the rst section journalling pulleys and reversing ratchets, with adjustable pawls, the ropes looped around the pul- 2 leys, with a rope tensioning device and roller support comprising a plate, with rollers mounted in bearings thereon, and stub shafts mounted in bearings, such stub shafts having pulleys and ratchet wheels keyed thereto having adjustable 3 Y 7. In a device of the class specified the combination of a reciprocating trough section and a shovel trough section mounted to slide thereon, and having ropes at each side between terminal 3 brackets, frames secured to the rst section journalling pulleys and reversing ratchets, with adjustable pawls, the ropes looped around the pulleys, with a rope tensioning device and roller support comprising a plate with rollers mounted in 4 bearings thereon, and stub shafts mounted in bearings, such stub shafts having pulleys and ratchet wheels keyed thereto having adjustable pawls, with an arcuate track supporting the plate.

8. In a device of the class specied, the combination of a reciprocating trough section and a shovel trough section mounted to slide thereon and means to feed the second section in either direction, said means being mounted under the irst section, having ropes attached to the second ,Y section and adapted to control its movement.

ROBERT GIBSON. 

